Home / 3,991.80-5,982.60-2,236.80

Finding the Fourth Proportional to 3,991.80, 5,982.60 and 2,236.80

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Solution

The fourth proportional to 3,991.80, 5,982.60 and 2,236.80 is: 3,352.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.80 : 5,982.60 = 2,236.80 : x
  2. Step 2: Convert to fraction form
    3,991.80/5,982.60 = 2,236.80/x
  3. Step 3: Cross multiply
    3,991.80x = 5,982.60 × 2,236.80
  4. Step 4: Simplify right side
    3,991.80x = 13,381,879.68
  5. Step 5: Solve for x
    x = 13,381,879.68/3,991.80
  6. Step 6: Final answer
    x = 3,352.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.